Equipment and method for making a needle-fin tube, and a...

Details Equipment and method for making a needle-fin tube, and a... Equipment and method for making a needle-fin tube, and a...

B - Operations, Transporting

21

C

B21C 37/26 (2006.01) B21C 37/20 (2006.01) B21D 53/06 (2006.01) F28F 1/40 (2006.01)

Patent

CA 2638638

The invention concerns a method and equipment in the making of a needle-fin tube (100). The needle-fin tube (100) comprises nee-dle-like fin parts (11a1, 111a2...). For making an internal fin structure (30) in the needle-fin tubes (100), wherein the fin (30) circulates around the needle-fin tube (100) in a spiral manner from one end to the other of its tube stretch (120), the method includes the following stages: - the fin wire (50) is placed around a bar (11), which is moved and rotated along a straight line, and attached to the bar (11) it is moved inside the needle-fin tube (100) from its one end to the other - the wire (50) is released from the bar (11), whereupon it at-taches to the internal surface of the needle-fin tube's (100) tu-be (120) under its spring force. The invention also concerns a needle-fin tube (100).

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